Poor Readability of COVID-19 Vaccine Information for the General Public: A Lost Opportunity
2021
ABSTRACT Background All adults in the Unites States now have access to COVID-19 vaccines. During the vaccination process, Emergency Use Authorization (EUA) fact sheets are provided. Objective To analyze the ease of reading (i.e., readability) of the EUA-approved fact sheets for the vaccines currently available in the United States, the V-Safe adverse event survey script, and the Centers for Disease Control and Prevention (CDC) website on COVID-19 vaccines. Design We analyzed the readability of Pfizer, Moderna, and Janssen EUA fact sheets, as well as the V-Safe survey script and the vaccine-related information on the CDC website. Measurements Readability factors include the following: average length of paragraphs, sentences, and words; font size and style; use of passive voice; the Gunning-Fog index; the Flesch Reading Ease index; and the Flesch-Kincaid Grade Level index. Results Only the V-Safe adverse event survey script met readability standards for adequate comprehension. The mean readability scores of the EUA fact sheets and the CDC website were as follows: Flesch Reading Ease score (mean 44.35); Flesch-Kincaid Grade Level (mean 10.48); and Gunning-Fog index (mean 11.8). These scores indicate that a 10th-12th grade-level education is necessary to comprehend these documents. Conclusion The average person in the United States would have difficulty understanding the information provided in the EUA fact sheets and CDC COVID-19 vaccine website; however, the V-Safe survey was written at an appropriate reading level. To ensure that the public fully understands information regarding COVID-19 vaccines, simplified information material should be developed.
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